NATURAL HISTORY · CATALOGUE RECORD
Peru Keelback
Helicops yacu Rossman & Dixon, 1975
Source-backed taxonomic record
Accepted species in Catalogue of Life’s 11 September 2026 base release. This preserves the source classification and available supporting data; it is not a completed species monograph.
Identity & source status
- Scientific name
- Helicops yacu Rossman & Dixon, 1975
- Name authority
- Rossman & Dixon, 1975
- Common name
- Peru Keelback
- Rank
- species
- Accepted status
- accepted
- Kingdom
- Animalia
- Phylum
- Chordata
- Class
- Reptilia
- Order
- Squamata
- Family
- Colubridae
- Genus
- Helicops
- Extinction status
- Not supplied by this source
Classification family tree
Nested taxonomic groups from the source. This is not a direct-ancestor chain, a dated evolutionary tree or a phylogenetic reconstruction.
- domainEukaryota (Chatton, 1925) Whittaker & Margulis, 1978
- kingdomAnimalia
- phylumChordata
- subphylumVertebrata
- infraphylumGnathostomata
- parvphylumOsteichthyes
- megaclassTetrapoda
- classReptilia Laurenti, 1768
- orderSquamata Oppel, 1811
- suborderSerpentes Linnaeus, 1758
- infraorderAlethinophidia Nopcsa, 1923
- familyColubridae
- subfamilyDipsadinae
- genusHelicops
- speciesHelicops yacu Rossman & Dixon, 1975
Close classified relatives
These entries share the source’s genus, Helicops. They are not necessarily the closest relatives established by molecular evidence.
| Species | Classification | Source status |
|---|---|---|
| Brown-banded watersnakeHelicops angulatus (Linnaeus, 1758) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Helicops apiaka Kawashita-Ribeiro, Ávila & Morais, 2013 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Daniel's KeelbackHelicops danieli Amaral, 1938 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Sao Paulo KeelbackHelicops gomesi Amaral, 1922 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Ladder Keelback (Hoge's Keelback)Helicops scalaris Jan, 1865 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Spiral KeelbackHelicops petersi Rossman, 1976 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Helicops nentur Costa, Santana, Leal, Koroiva & Garcia, 2016 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Helicops boitata Moraes-Da-Silva, Cecília Amaro & Sales-Nunes | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Helicops phantasma Moraes-Da-Silva, Cecília Amaro, Sales-Nunes, Rodrigues & Curcio, 2021 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Helicops acangussu Moraes-Da-Silva, Walterman, Citeli, Sales-Nunes & Curcio, 2022 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Wied's KeelbackHelicops carinicaudus (Wied-Neuwied, 1824) | ColubridaeChordata | Accepted speciesExtinction status not supplied |
| Hagmann's KeelbackHelicops hagmanni Roux, 1910 | ColubridaeChordata | Accepted speciesExtinction status not supplied |
Documented distribution
Source distribution statements, not a complete range map. A listed locality is not necessarily a place of origin.
Source literature & publication evidence
References attached to this source record, including nomenclatural citations where supplied. This is a selected bibliography; abbreviated citations remain in the source’s form.
- https://reptile-database.reptarium.cz/species?genus=Helicops&species=yacu Source fields: Taxon.tsv dwc:namePublishedIn, Taxon.tsv dcterms:references
Origins, evidence & remaining research
Name authority and publication references document nomenclature where the source supplies it. They do not establish evolutionary origins or the earliest fossil occurrence.
Specimen-level evidence, morphology, ecological research, phylogenetic studies, a comprehensive bibliography and a located literary passage have not yet been compiled for this record. A suitable sourced image remains to be added.
Dataset citation & attribution
This exact taxon in ChecklistBank · Catalogue of Life 2026-09-11
Catalogue of Life 2026-09-11; dataset 316321; doi:10.48580/dgz5n. https://creativecommons.org/licenses/by/4.0/ . Retrieved 5 October 2026.
Stable key: col:3K96T. Classification follows source parent identifiers. English common names may vary by region.